Floodway 04 : A longitudinal depression in a carriageway specially constructed to allow the passage of floodwater across it without damage. The cross-section of a stream in flood plus a nominated area for freeboard
Peter Milne and Kieran Sharp, ARRB Group, and Bob Ungers, consultant, Austroads Glossary of Terms (4th Ed.), Austroads Ltd., Sydney, NSW, Australia 2010. http://www.bicyclensw.org.au/files/u1/Austroads_Gl ossary_of_Terms_4th_edition.pdf (Road Trfc and Transp Sfty - Brit) {529}